Description: 6pcs 6mm Diamond Hole Saw Cutter Drill Bit for Tile Ceramic Glass Porcelain Marble Specification: Material: steel Size: 50mm\/1.97"(length) x 6mm\/0.24"(hole size) Features: --Ideal for drilling ceramic tiles, glass, marble, slate and porcelain tiles up to hardness grade 5. --Diamond hole saw tile ceramic glass porcelain marble drill. --Need Cooling and lubrication,always use lubrication (water) , otherwise the diamond core will over heat. Use method: 1.Clamped firmly to a bench to allow for slow controlled drilling. 2.Make a template from a piece of timber or waste material, locate this over the area where you want to drill your hole and use it as a "guide" to start the hole. 3.Once you've got into the surface by 1mm to 2mm you can remove the guide and continue to drill in a controlled manner. 4.Start your hole diagonally, make a round trace and then hold drill straight. Package Included: 6 x Diamond Hole Saw More Details: